Preheat oven to 400F.
Prepare a baking sheet by lining it with a silicone baking mat or parchment paper. Place your halved Brussels sprouts, cut side down, on the prepared baking sheet in one single layer. Roast in preheated oven for 12 minutes.
Remove baking sheet from oven (DON'T turn the oven off yet!). Using a spatula (or other kitchen utensil of choice), carefully flip all Brussels sprouts so that the cut sides are now up. Return to oven and roast another 7 minutes, or until they have reached your desired level of crispiness.
While the Brussels sprouts are roasting, create your smoky dressing by combining all other ingredients in a small jar. Place the lid on the jar and shake until ingredients are evenly incorporated. (Alternatively, you could simply combine in a bowl by whisking with a fork.)
Once Brussels sprouts are done roasting, add the Brussels sprouts and dressing to a medium-large bowl. Toss together until Brussels sprouts are evenly coated in the dressing.
Serve immediately and enjoy!